<template>
 

    <el-container class="home_container">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button> 
        </el-header>
        <!-- 主体区域 -->
        <el-container>
        <!-- 侧边栏区域 -->
        <el-aside :width="isCollapse ? '64px' : '200px'"> 
            <div class="toggle-btn" @click="toggleclaps">|||</div>
            <!-- 侧边栏菜单区域 -->
            <el-menu background-color="#333744" text-color="#fff"  active-text-color="#409eff" unique-opened :collapse="isCollapse" :collapse-transition="false" :router="true" :default-active="activePath">
                <!-- 一级菜单区 -->
                <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
                    <!-- 一级菜单模板区域 -->
                    <template slot="title">
                        <!-- 图标区域 -->
                    <i :class="iconsObj[item.id]"></i>
                        <!-- 文本区域 -->
                    <span>{{item.authName}}</span> 
                    </template>

                    <!-- 二级菜单 -->
                    <el-menu-item :index="'/' + subitem.path" v-for="subitem in item.children" :key="subitem.id"  @click="saveNavState('/' + subitem.path)">
                        <template slot="title">
                                <!-- 图标区域 -->
                            <i class="el-icon-menu"></i>
                                <!-- 文本区域 -->
                            <span>{{subitem.authName}}</span> 
                        </template>
                    </el-menu-item>

                </el-submenu>
            </el-menu>
        </el-aside>
        <!-- 内容区域 -->
        <el-main>
            <!-- welcome 占位符 -->
            <router-view></router-view>

        </el-main>
        </el-container>
    </el-container>

    
</template>

<script>
export default {
    data(){
        return{
            menuList:[],
            iconsObj:{
                '125':'iconfont icon-user',
                '103':'iconfont icon-tijikongjian',
                '101':'iconfont icon-shangpin',
                '102':'iconfont icon-danju',
                '145':'iconfont icon-baobiao',
            },
            isCollapse:false,
            // 被激活的动态地址
            activePath: ''
        }
    },

    created(){
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList(){
      const {data:res} = await this.$http.get('menus')
      if(res.meta.status !== 200) return this.$massage.errro(res.meta.msg)
      this.menuList = res.data
    },
    // 切换菜单的折叠展开

    toggleclaps(){
        this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath){
        window.sessionStorage.setItem('activePath',activePath)
        this.activePath = activePath
    }
  }

}
</script>

<style lang="less" scoped>
.home_container{
    height: 100%;
}
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div{
        display:flex;
        align-items: center;
        img{
            margin-right: 15px;
        }

    }

}
.el-aside{
    background-color: #333744;
    .el-menu{
        border-right: 0;
    }
}
.el-main{
    background-color: #eaedf1;
}
.iconfont{
    margin-right: 10px;
}
.toggle-btn{
    background-color: #4a5064;
    text-align: center;
    color: #fff;
    font-size: 10px;
    line-height: 24px;
    letter-spacing: 0.2em;
    font-weight: 700;
    cursor: pointer;
}
</style>


